Combined toilet seat air vent and exhaust system



FIG. 1 is a perspective view of a combined toilet seat air vent and exhaust system showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof. 

The ornamental design for a combined toilet seat air vent and exhaust system, as shown. 